Product Description
Interstate-McBee M-3959052 Oil Pan Gasket – 89–98 5.9L Cummins (Aftermarket)
Direct-fit oil pan gasket engineered to OEM dimensions for the 1989–1998 5.9L Cummins (6BT/12-valve) used in Dodge Ram 2500/3500. Built for dependable sealing during pan service or lower-end refresh, this Interstate-McBee aftermarket replacement offers OEM-style fit and durability at a better value.
- OEM-equivalent fit: Cross-references Cummins 3959052 and related numbers (see list below).
- Reliable seal: Purpose-built to maintain pan sealing integrity under heat and vibration.
- Aftermarket value: Quality replacement without OEM price inflation.
- Easy install: Designed for stock pan and factory fasteners.
Specifications
| Manufacturer | Interstate-McBee |
|---|---|
| Part Number | M-3959052 |
| OEM Reference (Cummins) | 3959052 |
| Additional Cross-References | Cummins: 3901287, 3904577, 3906028, 3911536, 3931346, 3937072 Mopar: 04429536, 05003694AA, 05003694AB |
| Position | Engine oil pan to block |
| Category | Sealing / Gaskets |
What’s Included
- (1) Oil pan gasket
Vehicle Fitment
Always verify by engine serial number (ESN) for edge cases.
- Dodge Ram 2500/3500 — 5.9L Cummins (6BT/12V): 1989–1998 primary fitment.
- Extended compatibility: Also widely listed for 1998.5–2002 5.9L Cummins 24-valve (ISB); confirm by ESN before ordering.
- Industrial/Off-Highway: Common across Cummins 4BT/6BT/ISB/QSB platforms; verify by model & ESN.
Install Notes
- Clean mating surfaces thoroughly; remove all old gasket/RTV.
- Follow Cummins service manual for torque specs and tightening sequence.
- Use small RTV dabs only where the service manual specifies (e.g., timing cover joints).
- Inspect pan rail for flatness; correct minor bends before install.
Warranty
Interstate-McBee new engine parts are typically warranted for 24 months from date of installation under normal use and service. See manufacturer policy for details.
Cross-Reference Summary
Cummins 3959052 (primary), plus 3901287, 3904577, 3906028, 3911536, 3931346, 3937072; Mopar 04429536, 05003694AA, 05003694AB.
Why Buy From CPP Diesel
- Diesel-specialist support with ESN verification.
- Curated B-Series parts for accurate fitment the first time.
- Fast shipping and hassle-free returns.
FAQ
Will this fit my 1998.5–2002 24-valve 5.9L?Many catalogs list this gasket for 1998.5–2002 ISB 24-valve models as well. We recommend confirming by ESN, as mid-year changes can occur.
Do I need to use RTV with this gasket?
Only where the Cummins service manual specifies (typically at junctions like timing cover corners). Avoid full-surface RTV.
Is this an OEM Cummins part?
No. This is an Interstate-McBee aftermarket replacement built to OEM-equivalent specifications. If OEM-boxed Cummins is required, reference 3959052.
Can I reuse my old oil pan bolts?
In most cases yes, provided threads are clean and bolt heads are undamaged. Replace any stretched or corroded hardware and torque to spec.
